2. - changes in appearances of the Moon as viewed from Earth, due to the relative positions of the Moon, Earth, and the Sun. A. Maria
B. Moon phase
C. Solar eclipse
D. Lunar eclipse

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

Suppose that f : rn → rm and that a ∈ k, where k is a connected subset of rn . suppose further that for each x ∈ k there exists a δx > 0 such that f(x) = f(y) for all y ∈ bδx (x). prove that f is constant on k; that is, f(x) = f(a) for all x ∈ k

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87